Asymmetrical Clipping Optical Filter Bank Multi-Carrier Modulation Scheme

Ibrahim, Asmaa; Prat, Josep; Ismail, Tawfik

doi:10.21203/rs.3.rs-248482/v1

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…Each element of the DST matrix 𝐵 of size 𝑁 × 𝑁 in the m-th row and n-th column is defined as follows [18]: It is a real trigonometric transform with a self-inverse property. The output sequence of a DHT precoding technique is performed by multiplication between the input data sequence and the following equation [28,29]. Each element of DHT matrix 𝐵 of size 𝑁 × 𝑁 in the m-th row and n-th column is defined as follows:…”

Section: Discrete Sine Transform (Dst)mentioning

confidence: 99%

Hybrid PAPR reduction schemes for different OFDM-based VLC systems

2024

Opto-Electronics Review

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Orthogonal frequency division multiplexing has been widely used in many radio frequency wireless communication standards as a preferable multicarrier modulation scheme. The modulated signals of a conventional orthogonal frequency division multiplexing system are complex and bipolar. In intensity-modulated direct detection optical wireless communications, transmitted signals should be real and unipolar due to non-coherent emissions of an optical light emitting diode. In this paper, different hybrid optical systems have been proposed to satisfy real and unipolar signals. Peak-to-average power ratio is one of the biggest challenges for orthogonal frequency division multiplexing-based visible light communications. They are based on a combination of non-linear companding techniques with spreading or precoding techniques. Simulation evaluation is performed under direct current-biased optical orthogonal frequency division multiplexing, asymmetrically clipped optical orthogonal frequency division multiplexing, and Flip-orthogonal frequency division multiplexing systems in terms of peakto-average power ratio, bit error rate, and spectral efficiency. The proposed schemes are investigated to determine a scheme with a low peak-to-average power ratio and an acceptable bit error rate. MATLAB TM software has been successfully used to show the validity of the proposed schemes.

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Section: Discrete Sine Transform (Dst)mentioning

confidence: 99%

Hybrid PAPR reduction schemes for different OFDM-based VLC systems

2024

Opto-Electronics Review

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“…The results show that using 64-QAM, the BER of DCO-FBMC/OQAM is lower than 10 −4 compared to 10 −3 when DCO-OFDM was used. ACO-FBMC/OQAM was first developed in [20]. The Interframe interference is eliminated using a proposed iterative receptive model.…”

Section: Related Workmentioning

confidence: 99%

Hybrid NOMA-Based ACO-FBMC/OQAM for Next-Generation Indoor Optical Wireless Communications Using LiFi Technology

Hesham¹,

Ismail

2021

Preprint

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The light fidelity (LiFi) has been successfully used to achieve high data transfer rates, high security, great availability, and low interference. In this paper, we propose a LiFi system consisting of a combination of non-orthogonal multi-access (NOMA), asymmetrically-clipped optical (ACO) and filter bank multicarrier (FBMC) techniques combined with offset quadrature amplitude modulation (OQAM). The paper also applies a $\mu$-law companding approach for a high peak to average power ratio (PAPR) reduction of the FBMC/OQAM scheme. The combination of NOMA, ACO-FBMC/OQAM, and $\mu$-law companding allows a significant increase in throughput and a significant reduction in non-served users. An appropriate algorithm is developed considering two scenarios, maximize the throughput and minimize the number of blocked (non-served) users. The results show that the throughput of the system can be increased by $1.8$ compared to FBMC and OFDM. Furthermore, the proposed system reduces the number of blocked users below $10\%$, while the system can provide $30\%$ or $60\%$ in case only the FBMC or OFDM is used, respectively.

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“…The results show that using 64-QAM, the BER of DCO-FBMC/OQAM is lower than 10 −4 compared to 10 −3 when DCO-OFDM was used. The ACO-FBMC/OQAM was first developed in Ibrahim et al (2021). The Interframe interference is eliminated using a proposed iterative receptive model.…”

Section: Introductionmentioning

confidence: 99%

Hybrid NOMA-based ACO-FBMC/OQAM for next-generation indoor optical wireless communications using LiFi technology

Hesham

Ismail

2022

Opt Quant Electron

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Light fidelity (LiFi) has successfully achieved high data transfer rates, high security, great availability, and low interference. In this paper, we propose a LiFi system consisting of a combination of non-orthogonal multi-access (NOMA), asymmetrically-clipped optical (ACO), and filter bank multicarrier (FBMC) techniques combined with offset quadrature amplitude modulation (OQAM). The paper also applies a $$\mu $$ μ -law companding approach for a high peak to average power ratio (PAPR) reduction of the FBMC/OQAM scheme. The combination of NOMA, ACO-FBMC/OQAM, and $$\mu $$ μ -law companding allows a significant increase in throughput and a significant reduction in unserved users. Considering two scenarios, an appropriate algorithm is developed to maximize the throughput and minimize the number of blocked (unserved) users. The results show that the overall system throughput could be increased by 1.8 compared to FBMC, OFDM, and OFDM-NOMA. Furthermore, the proposed system reduces the number of unserved users below $$10\%$$ 10 % , while the system can provide 30 or $$60\%$$ 60 % in case only OFDM-NOMA, FBMC, or OFDM is applied.

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Asymmetrical Clipping Optical Filter Bank Multi-Carrier Modulation Scheme

Cited by 3 publications

References 7 publications

Hybrid PAPR reduction schemes for different OFDM-based VLC systems

Hybrid PAPR reduction schemes for different OFDM-based VLC systems

Hybrid NOMA-Based ACO-FBMC/OQAM for Next-Generation Indoor Optical Wireless Communications Using LiFi Technology

Hybrid NOMA-based ACO-FBMC/OQAM for next-generation indoor optical wireless communications using LiFi technology

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